Concrete-mixing machine.



J. L. WETTLAUPER.

CONCRETE MIXING MACHINE.

APPLIGATION. FILED MAR. 3, 1911.

1,109,097. ed Sept, 1, 1914 THE JURRIS PETERS COUPHO1U LITHDHWASHINGTON. 0. C.

{UNITED STATESTATENT! .coivcenrn-lvrixme MAcH Nnj 2. Application filedmarch3,1911.-'SerialNiilGlZJlQl To all whom it may concern away toexhibitthe construction.

Be it known that I, JOHN Lnwis WE'rT- LAUFER, of the city of Toronto,iii the county of York, in the Province of Ontario, Canada, haveinvented certain new and"usefuljIImrovements in Concrete-MixingMachines;

of which the following is the specification.

My invention relates to improvements in concrete mixing machines and theobject of the invention is to so arrange for the dumping of the machinethat it may be controlled from the back of the machine, where thematerial is received and thus dispense with an extra man usuallyemployed at the front to regulate the dumping of the drum.

My invention consists of an eccentric secured to the main shaft and astrap encircling the same and provided with a connecting rod, and alever havingxa pivotal joint connection to the rod, and a toggle jointconnection to the drum frame, a clutch on the shaft and a suitableleverforthrowing the clutch in and out as hereinafter more particularlyexplained.

- Figure 1, is an end elevation of my con crete mixing machine shewingthe parts involved in my invention. Fig. 2, is a sectional plan with thedrum partially broken In the drawings like letters of reference indicatecorresponding parts in each figure.

A is the main frame, which is supported on any suitable truck. T

A is the drum. 7

B are standard brackets and C is a tiltable drum frame, which dependsfrom a trunnion shaft C extending through the top ofthe standardbrackets B. The trunnion shaft G about which the drum frame tilts isbetween the drum and its frame, and is so positioned as to bringthecenter of gravity of the drum and its frame as near the axis of tilt aspossible'when the drum is loaded:

0 is a stud shaft journaled in bearing brackets G on the drum frame. y

C is a bevel gear mounted on the stud shaft G". e I

C is a bevel gear mounted on the trunnion shaft and meshing with thegear C C is a gear ring on the drum A. D is the main driving shaft. Aspur gear is provided on this shaft D which meshes with a spur gear onthe trunnion shaft G from whence motion is imparted to the rotatingmeans for the drum through the bevel the "stud shaft Y O, and so 011 tothe. drum,

preferred,"I' may make the spur gear on the trunnion shaft and the bevelgear 0 of one piece. I E-i's a normally inoperative is ual connectingrod E? having a forked end F is a lever fulcrumed on thecross bar A" andconnected by a pin F to the forked end of the connecting rod E v F is alink- 'pivotally connected to the frame 0 at'its downwardly moving sideand to the lever]? and forming a toggle joint with the lever.

G is a clutch of any suitable, type'for con necting and disconnectingthe'eccentric E from the power shaft D and H is-an operating lever,which is provided with pins H, which extend in the usual grooved collarof the clutch. By manipulating the lever H the clutch operates to throwthe eccentric with its frame tilting means into and out of operation.

j-It will be seen thatthe lever H extends to the rear or feeding end ofthe drum and gear'Ct onfthe' trunnion shafflthe gear eccentric locatedthereon and E is the strap p of the eccentric, which is provided withthe consequently is in control of the man, who is usually employed atthis side of the machine. This man may by throwing the clutch in providefor the ready dumping of the drum as the eccentric will be then thrown1n mot on and will impart the necessary pull through the lever 'F andtoggle jointed link F to the discharge end of the frame, thus throwingit down and the drum likewise, so as to discharge the contents of thedrum. The lever may be thrown in permanently and in this case the drumwill be tilted periodically, this depending upon the speed at which theshaft rotates, which may be, of course, predetermined according to thera-. pidity with which it is found that-the drum may be filled withmaterial. By having the pivotalaxis between the drum and its frame it ispossible to have the centerof gravity of the drum-and its frame," whenloaded, fallvery nearly within this axis,;which means that the drum andits apparatus is so nicely balanced on its pivotal: axis that eventhoughit' may contain a considerable weight offc'oncrete material, itwill take only aminimum of power to cause it to dump. This easy tiltingfeature, togtthei l with the control of: the dumping of the me chine atthe feeding end carries out. the object of my invention of securing aone-man main frame, a trunnion shaft, supports therefor on said frame, atiltable drum frame depending from said trunnion shaft 7 a drum on saiddrum frame havingv opposite feed and discharge openings, the piv-Y otalaxis of said drum frame being between saiddrum frame and'thedrumthereon, the 1 center of gravity of said drumand-its frame,

said axis, rotating means for said drum, a power'shaft, means coaxialwith sald trunnion shaft for transmitting power from said power shaft tosaid rotating means, normally inoperative tilting means for the drum"frame, means for operatively connecting said rotatingmeans and saldtilting means.

JOHN LEWVIS WETTLAUFER.

Witnesses:

v, H. PRESTON,

B. Born.

Copies of this patent may be obtained for; jiire ce it b'fa'ddrssingthe: a Commission er of Patents, I Washington, D. C.-

